[Bug testsuite/80221] Contrib script to rewrite testcase from absolute to relative line numbers

[vries at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80221

--- Comment #16 from Tom de Vries <vries at gcc dot gnu.org> ---
Created attachment 41243
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41243&action=edit
tentative patch implementing dg-save-linenr